Measurement of the Z plus b-jet cross-section in pp collisions at √s=7 TeV in the forward region

被引：0

作者：

Aaij, R. ^{[42
]}

Adeva, B. ^{[38
]}

Adinolfi, M. ^{[47
]}

Affolder, A. ^{[53
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[6
]}

Albrecht, J. ^{[9
]}

Alessio, F. ^{[39
]}

Alexander, M. ^{[52
]}

Ali, S. ^{[42
]}

Alkhazov, G. ^{[30
]}

Alvarez Cartelle, P. ^{[38
]}

Alves, A. A., Jr. ^{[25
,39
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[22
]}

Amhis, Y. ^{[7
]}

An, L. ^{[3
]}

Anderlini, L. ^{[17
,75
]}

Anderson, J. ^{[41
]}

Andreassen, R. ^{[58
]}

Andreotti, M. ^{[16
,74
]}

Andrews, J. E. ^{[59
]}

Appleby, R. B. ^{[55
]}

Gutierrez, O. Aquines ^{[10
]}

Archilli, F. ^{[39
]}

Artamonov, A. ^{[36
]}

Artuso, M. ^{[60
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[25
,82
]}

Baalouch, M. ^{[5
]}

Bachmann, S. ^{[11
]}

Back, J. J. ^{[49
]}

Badalov, A. ^{[37
]}

Baesso, C. ^{[61
]}

Baldini, W. ^{[16
]}

Barlow, R. J. ^{[55
]}

Barschel, C. ^{[39
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[48
]}

Batozskaya, V. ^{[28
]}

Battista, V. ^{[40
]}

Bay, A. ^{[40
]}

Beaucourt, L. ^{[4
]}

Beddow, J. ^{[52
]}

Bedeschi, F. ^{[23
]}

Bediaga, I. ^{[1
]}

Belogurov, S. ^{[31
]}

Belous, K. ^{[36
]}

Belyaev, I. ^{[31
]}

Ben-Haim, E. ^{[8
]}

机构：

[1] CBPF, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil

[3] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[4] Univ Savoie, LAPP, CNRS, IN2P3, Annecy Le Vieux, France

[5] Univ Blaise Pascal, Clermont Univ, IN2P3, CNRS,LPC, Clermont Ferrand, France

[6] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[7] Univ Paris 11, LAL, CNRS, IN2P3, Orsay, France

[8] Univ Paris Diderot, Univ Paris 06, LPNHE, CNRS,IN2P3, Paris, France

[9] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

[10] MPIK, Heidelberg, Germany

[11] Heidelberg Univ, Inst Phys, Heidelberg, Germany

[12] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[13] Sez INFN Bari, Bari, Italy

[14] Sez INFN Bologna, Bologna, Italy

[15] Sez INFN Cagliari, Cagliari, Italy

[16] Sez INFN Ferrara, Ferrara, Italy

[17] Sez INFN Firenze, Florence, Italy

[18] Lab Nazl INFN Frascati, Frascati, Italy

[19] Sez INFN Genova, Genoa, Italy

[20] Sez INFN Milano Bicocca, Milan, Italy

[21] Sez INFN Milano, Milan, Italy

[22] Sez INFN Padova, Padua, Italy

[23] Sez INFN Pisa, Pisa, Italy

[24] Sez INFN Roma Tor Vergata, Rome, Italy

[25] Sez INFN Roma La Sapienza, Rome, Italy

[26] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[27] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland

[28] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[29] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest 077125, Romania

[30] PNPI, Gatchina, Russia

[31] ITEP, Moscow, Russia

[32] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[33] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia

[34] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[35] Novosibirsk State Univ, Novosibirsk 630090, Russia

[36] IHEP, Protvino, Russia

[37] Univ Barcelona, Barcelona, Spain

[38] Univ Santiago de Compostela, Santiago De Compostela, Spain

[39] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[40] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[41] Univ Zurich, Inst Phys, Zurich, Switzerland

[42] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[43] Vrije Univ Amsterdam, Amsterdam, Netherlands

[44] NSC KIPT, Kharkov, Ukraine

[45] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[46] Univ Birmingham, Birmingham, W Midlands, England

[47] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[48] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[49] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[50] STFC Rutherford Appleton Lab, Didcot, Oxon, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 01期

基金：

美国国家科学基金会;

关键词：

Hadron-Hadron Scattering;

D O I：

10.1007/JHEP01(2015)064

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The associated production of a Z boson or an off-shell photon gamma* with a bottom quark in the forward region is studied using proton-proton collisions at a centre-of-mass energy of 7TeV. The Z bosons are reconstructed in the Z/gamma* -> mu(+)mu(-) final state from muons with a transverse momentum larger than 20 GeV, while two transverse momentum thresholds are considered for jets (10 GeV and 20 GeV). Both muons and jets are reconstructed in the pseudorapidity range 2.0 < eta < 4.5. The results are based on data corresponding to 1.0 fb(-1) recorded in 2011 with the LHCb detector. The measurement of the Z+b-jet cross-section is normalized to the Z+jet cross-section. The measured cross-sections are (Z/ (mu+ mu-) + b-jet) = 295 60 (stat) 51 (syst) 10 (lumi) fb (0.1) for p T(jet) > 10 GeV, and (Z/ (mu+ mu-) + b-jet) = 128 36 (stat) 22 (syst) 5 (lumi) fb (0.2) for p T(jet) > 20 GeV.

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